Browser Screen Sharing: Fullscreen, Mobile Gestures, and Refresh
Build a usable WebRTC screen share from source selection and sender controls to fullscreen, landscape, pinch and pan, viewer refresh, reconnect, stop behavior, and privacy.
uCopy Technical Blog
Clear explanations for connections that work in real life · Page 8
Practical uCopy guides to WebRTC, P2P file transfer, STUN and TURN, LAN discovery, resumable transfers, screen sharing, privacy, and security.
WebRTCP2P transferSTUN / TURNPrivacy & security
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Threat Modeling Screen Sharing Before, During, and After Capture
Model capture selection, permission prompts, sensitive windows, viewer identity, transport encryption, recording risk, background state, and track cleanup after stop.
E2E Tests for Fullscreen, Rotation, Zoom, and Screen Panning
Test video fit, fullscreen permission, orientation, pinch zoom, bounded pan, controls, and post-refresh terminal state for remote screen viewing.
Screen Wake Lock Lifecycle for Long Transfers and Screen Sharing
Request screen wake lock only for explicit need and handle permission, low battery, visibility changes, system release, and task terminal states without needless drain.
SCTP Message Size and Interleaving Across DataChannels
Understand max-message-size, SCTP fragmentation, message interleaving, and head-of-line blocking to choose safe chunks across browsers and high-latency TURN paths.
Is Browser File Sharing Safe? A 12-Point Practical Checklist
Review device approval, temporary codes, WebRTC encryption, TURN metadata, file digests, download risk, feature permissions, error reports, and analytics before trusting a browser transfer.
A Secure Data Export API with One-Time Downloads
Design reauthentication, scope preview, asynchronous generation, encrypted temporary objects, short-lived one-time links, audit, and deletion to prevent bulk leakage.
How to Measure Whether WebRTC Is Direct or Using TURN
Locate the selected candidate pair in getStats, classify host, srflx, prflx, and relay, and handle multiple transports, route changes, and browser differences.
Self-Service Diagnostic Bundles Without Uploading Private Content
Generate a locally previewable bundle with versions, capabilities, normalized state traces, network type, and error codes while excluding content, filenames, secrets, and full addresses.
Semantic Help Search That Understands Symptoms Instead of Exact Terms
Build bilingual chunking and hybrid keyword-plus-embedding retrieval, reranking by product version, feature, and error code with explicit citations.
How to Send Large Files Between a Phone and Computer
Compare a cable, local sharing, cloud storage, and browser P2P for multi-gigabyte transfers, then check speed, mobile data, resume support, free space, and verification before you start.
Verifying a Reselected Source File After Sender Refresh
Layer filename, size, modification time, quick fingerprints, and full digests to handle same-name files, edited versions, large-file delay, and safe resume.
Why File Control and Bulk Data Need Separate Scheduling
Design channels and priorities for metadata, accept, pause, cancel, acknowledgements, and bulk chunks so a large file cannot make every interaction unresponsive.
Service Worker Cache Strategies by Shell, Articles, and APIs
Choose cache-first, network-first, or stale-while-revalidate separately for versioned assets, HTML navigation, articles, fonts, and dynamic APIs with bounds.
Service Worker Update Prompts During Active Real-Time Tasks
Detect waiting workers and decide prompt, defer, or forced refresh by security urgency, normal release, and active work rather than breaking tasks with skipWaiting.
Safe Service Worker Updates Across Live Protocol Sessions
Design install, waiting, skipWaiting, and clients.claim so live transfers are not taken over mid-session, using protocol negotiation and deferred activation.
Session Fencing Tokens That Exclude Stale Tabs and Connections
Use a monotonically increasing epoch to isolate signaling, heartbeats, ICE candidates, and feature commands across refresh so stale tabs cannot corrupt a recovered connection.
Issuing Short-Lived Credentials with a Minute-Scale Blast Radius
Issue short-lived audience-restricted credentials for TURN, uploads, and temporary APIs while handling renewal, clock skew, caching, revocation, and signing-key rotation.
Signing-Key Rotation with Overlap, Key IDs, and Emergency Revocation
Build automated rotation, dual-key verification, kid selection, cache refresh, and compromise response for credentials and session tokens without mass disconnects.
Testing Simultaneous Refresh as a Deterministic Reconnection Race
Control A/B refresh offsets, old-socket close delay, and new-session registration order to enumerate recovery order, stale signaling, and offer collision.
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